High pressure steam generator



April 30, 1940; LED EG 2,198,778

HIGH PRESSURE STEAM GENERATOR Filed Nov. 16, 1936 After/rays Patented Apr. 30, 1940 a 2,198,778 I'IIGH PRESSURE s'r A u ame ds Maximilian Ledinegg, Mahrisch-ostrau, Czechoslovakia a Claims. (Cl. 122-31) The invention relates to the production of high pressure steamfby blowing superheated steam into thewater spaceo f a boiler drum. This systern of "steam production enables the boiler to be operated with very high concentration of salts in,the boiler water, particularly when effecting positive circulation of the steam serving as heat carrier. The objectlof theinvention is to ensure and to improve thepurity of the steam produced and to enable even 'fmore concentrated boiler water to be employed. 1 j j Accordingto this'invention in order to attain thisobjectjthe feed waterfis fed into the boiler drum in the neighb ourhoodof the individual hot steam injectors orjthepluralityof the injectors in such away thatthe concentration of salts in theboiler water in the region of the outlet open ing of each injector is less thanifn the remaining Water spaceof the boiler drum andthej most in tensive vaporisation takes place in this region of lower concentration of salts in the boiler The accompanying drawing illustrates by way of example three embodiments of boiler plants drum for the production of steam; 2 the inlet pipe for the hot steam serving as heat carrier, 3 the injectors from which the hot steam is blown into the water space of the boiler I, preferably in a downward direction, and 4 the inlet pipe for the fresh feed water,

In the embodiment illustrated in Fig. 1 the feed wateris introduced from the distributing pipe 4 through separate injectors 5 into the water space of the boiler I. example disposed close to each steam injector 3.

One feed water injector 5 is for These injectors 5 are fan shaped and inclined slightly downwards to the horizontal, each being directed towards the region in front of the outlet opening of one steam injector 3. The feed water accordingly flows in a wide jet in front of the outlet opening of each steam nozzle 3 and fills up the region in front thereof The hot steam discharging from the injectors 3 consequently meets fresh feed water, before coming into contact with the boiler water, which is considerably concentrated in salts etc., and the first transfer of heat, i. e., the most intensive vaporisation, takes place within this region of lower concentration of the water.

With this arrangement of the distributing pipe 4 and the feed water injectors 5 the movement of l, steam injectors 3Q thewater' teneme t thejboiler drum is also:

favourably promoted by the feed water flowing out of the injectors 5. t

In the embodiment illustrated in FigQZa feed water inlet or injector 6' is' disposed directly in 5 front of theoutlet opening of eachsteam injector 3. These feed water injectors 6, which, in order to control the distributionof thejfeed water to the individual injectors, areformed of throttling discs, are turned towards the steam injectors 3c and constructed in the form of open funnels n1, whichjwiden out tothe cross section of the outlet openings of the steamdnjectors 3 or wider." A baffle plate 8 is dispcsedin each of theseffunnel shaped injectors l in such a way thatjets of feed water cannotbe injected into the interior of the In the embodiment illustrated in Fig, 3 the feed water outlets are constructed in the form of annular nozzles or injectors. 9, which are dis-. posed concentricallyaround'the steam injectors 3 and in thesame direction as the same. These feed water injectors 9 are tapered conically at the delivery end, so as to prevent the annular jets of feed water from spreading out. Conical guide rings II) are likewise disposed on the inner edge of the feed water injectors Sin order to contract the feed water jet in the form of a cone. These guide rings In may also serve the purpose of preventing the hot steam currents from spreading on their discharge from the steam injectors 3. Baflle plates I l are disposed at a short distance in front of the outlet openings of the steam injectors 3 and the feed water injectors 9. As a result thereof the hot steam jets must cross the annular feed water jets, before they reach the highly concentrated boiler water.

The feed water is introduced into the injectors 9 from the distributing pipe 4 through channels l2, which surround the steam injectors 3 along the greater part of their length. The feed water is conveyed from the distributing pipe 4 into the upper end of the annular channels [2, so that a outlet openings of said steam nozzles and said feed water nozzles being directed toward one another in such manner that the feed water is directly conveyed toward theoutlet of said steam nozzles and that the steam leaving said steam nozzles is directly carried into said fresh feed water stream and must cross the same before coming in contact with the drum water.

2. A boiler plant as set forth in claim 1 in which said means for supplying feed water consist of fan shaped nozzles the openings of which are directed towards the outlet openings of said hot steam nozzles, the arrangement being such, that a stream of fresh feed water flows in the form of a wide jet in front ofeach hot steam nozzle.

3. A boiler plant as set forth in claim 1 in which said means for supplying feed water consist of feed water inlet nozzles in the form of an open funnel, each of said funnel-shaped nozzles being widened at least to the cross section of the outlet opening of the corresponding hot steam nozzle.

4. A boiler plant as set forth in claim 1 in which said means for supplying feed water consist of feed water inletnozzles in the form of an open funnel widening at least to the cross section of the outlet opening ofthe corresponding hot steam nozzle, and in which a baflle plate is arranged in each of said funnel shaped feed water nozzles in such a manner that the jets of feed water cannot enter the said hot steam nozzles.

5. A boiler plant as set forth in claim 1 in which said means for supplying feed water consist of nozzles disposed concentrically around the said hot steam nozzles in the same direction as the latter in such a manner'that the hot steam jets discharging into the boiler are surrounded by streams of fresh feed water. 7

6. A'boiler plant as set forth in claim 1 in which said hot steam nozzles are tapered conically and said means for supplying feed water comj which said means for supplying feed water comprise nozzles, the outlet openings of said nozzles being similar to the outlet opening of the superheated steam nozzle and being coaxially arranged to said steam nozzles in such a manner, that the superheated steam jets discharged from the nozzles into the boiler contact a body of fresh feed water before coming into contact with the boiler water.

9. A boiler plant as set forth in claim 1, in which said means for'supplying feed water comprise nozzles of the shape of an open funnel and are arranged coaxially to the steam nozzles directly in front of the outlet openings of same,

each of said funnel-shaped nozzles being widened out to at least the cross section of the outlet opening of the coordinate steam nozzle.-

10. A boiler plant as set forth in claim 1, in

which said means for supplying feed water comprise nozzles of the shape of an open funnel and are arranged coaxially to the steam nozzles directly in front of the outlet openings of same, each of said funnel shaped nozzles being widened out to at least the cross-section of the outlet opening of the coordinate steam nozzle, a baflle. plate being arranged in each of said, funnel shaped feed water nozzles in such manner that the jets of feed water are prevented from entering said superheater steam nozzles.

MAXIMILIAN LEDINEGG. P 

